DOI: 10.1016/j.foreco.2012.11.036
Scopus记录号: 2-s2.0-84874979649
论文题名: Tropical forest degradation by mega-fires in the northern Brazilian Amazon
作者: Xaud H.A.M. ; Martins F.S.R.V. ; Dos Santos J.R.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2013
卷: 294 起始页码: 97
结束页码: 106
语种: 英语
英文关键词: Degraded forests
; Diversity
; Floristic composition
; Forest fires
; Ordination methods
; Structure
Scopus关键词: Degraded forests
; Diversity
; Floristic compositions
; Forest fires
; Ordination methods
; Deforestation
; Structure (composition)
; Fires
; data set
; disturbance
; environmental degradation
; forest fire
; forest soil
; ordination
; physiology
; secondary succession
; species diversity
; species evenness
; species richness
; tropical forest
; Deforestation
; Fires
; Forest Fires
; Amazonas [Brazil]
; Brazil
英文摘要: In this study, we examine the degradation of tropical forests caused by the forest fires of anthropogenic origin that have frequently and intensely affected a large portion of the State of Roraima (northern Brazilian Amazon), such as the one that occurred in 1998 and extended over 12,000km2. In a region located in the so-called " Arc of Fire" in the State, data from all individuals with DBH≥10cm were collected in 50 sample plots (12.5ha). These plots were collected across five fire-degradation levels (classes), from unaffected areas to areas affected by one, two or three fires over 10years: 1998, 2003 and 2007. The floristic and phytosociological quantitative parameters in the analysis were as follows: species richness (defined classically and by rarefaction), evenness, Shannon diversity index, mixture coefficient, importance value (dominance, density and frequency), basal area, diameter, total height and volume. In the full set of plots, 5593 individuals were measured and identified in 177species/morphospecies and 53 families. We performed both univariate (ANOVA and Tukey's test) and multivariate analyses (ordination methods), aiming to find patterns of degradation by fire. The results revealed that forests affected by one low-intensity fire (BF1L) showed slight evidence of alteration in comparison with forests that have not burned (UF), taking all indicators evaluated into account. In extremely degraded forest plots, the heavily impacted forests lose their primary-forest characteristics, showing significant floristic and structural changes and similarity to areas of young secondary succession. Some aspects of these disturbances were observed not only in twice or thrice-affected areas (BF2, BF3) but also in areas that suffered from one high-intensity fire (BF1H). Given the observed results, we ought to consider that an extensive " secondarization" process caused by fire could plausibly reach more forest areas in this part of the Amazon in the near future. © 2012 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/66691
Appears in Collections: 影响、适应和脆弱性
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作者单位: Brazilian Agricultural Research Corporation, Embrapa Roraima, PO Box 133, Boa Vista, RR 69.301-970, Brazil; National Institute For Space Research, INPE, PO Box 515, São José dos Campos, SP 12227-010, Brazil
Recommended Citation:
Xaud H.A.M.,Martins F.S.R.V.,Dos Santos J.R.. Tropical forest degradation by mega-fires in the northern Brazilian Amazon[J]. Forest Ecology and Management,2013-01-01,294